Brake-shoe.



A. H. REID.

BRAKE SHOE.

APPLICATION FILED APR. 26. 1916.

Patented Nov. 21, 1916.

WITNESSES:

BY W W Armin/En;

UNI ED STAT Es PATENT OFFICE.

ANDREW H. REID, or TORONTO, ONTARIO, CANADA, ASSIGNOR TO AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF MAHWAH, NEW JERSEY, A CORPORATION OF NEW 4 JERSEY.

BRAKE-SHOE.

Specification of Letters Patent.

Patented Nov. 21, 1'91 6.

To all whom it may concern:

Be 1t known that I, ANDREW H. REID, a

subject of His Majesty, the King of Great tion which may be briefly described as follows: On a suitable metal back is cast a shoe of hydraulic cement suitably reinforced with metal and bound to the back. The cement has added thereto various ingredients intended to improve its frictional qualities.

A suitable construction for the shoe is illustrated in the accompanying drawings, in which Figure 1 is a longitudinal section of a brake shoe constructed in accordance with my invention; Fig. 2, a cross section; and Fig. 3 a plan view of the face of the shoe.

In the drawings, like letters of reference indicate corresponding parts in the difi'en ent figures.

A is a back preferably of steel provided with the attaching lugs B.

In molding the shoe I secure in suitable positions relative to the back a plurality of layers of metallic reinforcement C, preferably of a reticulated form such as expanded metal. The cement body D of theshoe is then cast about the back and reinforcement. The layers of reinforcing metal may run in any desired direction through the body of the shoe as may be found desirable and part of the reinforcement is preferably carried around the back to bind the body of the shoe thereto. The ends E of the back may be turned down into the body of theshoe, and tubes F may be supported therein which run through the shoe, as in my prior U. S. Patent No. 943,995, and Canadian Patent No. 122,502. These tubes serve to lighten and strengthen the shoe, but are not indispensable in the present construction.

While a good hydraulic cement, such as Portland cement, will give useful results, I

find that the best results are obtained when some friction increasing substance is added to the cement. For this purpose I employ sulfur, preferably in a proportion not exceeding 30 parts of sulfur to 70 of cement. The sulfur may be in part replaced by metallic antimony, salt, and asbestos, mica or crushed iron ore. I do not, however, desire to confine myself to the use of any specific friction increasing ingredients, as others than those' specified may be found useful for my purposes.

A shoe such as described will be found to satisfactorily attain the objects of my invention, s the reinforced concrete is light and strong, and its surface does not burn off *as does the surface of iron and steel shoes.

I further find that the reticulated metal so binds together every part of the body of the shoe that it has no more tendency to split or crack than any good all metal shoe.

What I claim'as my invention is 1. A brake shoe comprising a tough metal back; a plurality of layers of reticulated metal and a body of hydraulic cement cast about said back and reinforcement'and binding the same togethe'r.

2. A brake shoe formed of a mixture of hydraulic cement and sulfur reinforced with metal.

3. A brake shoe formed of a mixture of hydraulic cement, sulfur and salt, reinforced with metal.

I. A brake shoe formed of a mixture of hydraulic cement, sulfur, salt and antimony reinforced with metal.

5. A brake shoe formed of a mixture of hydraulic cement, sulfur, salt, antimony and "asbestos reinforced with metal.

6. A brake shoe comprising a tough metal back; a plurality of layers of reticulated metal in part inclosing said back and a body of hydraulic cement cast about said back and reinforcement and binding the same together. I

Signedat New York, borough of Manhat tan, in the county of New York and State of New York, this 18th day of April, A. D. 1916.

' ANDREW H. REID.

Witnesses;

ANNA V. WALSH, GEoReE E. COOK. 

